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  4. CVE 2026 78363 mw wp form 515 unauthenticated arbitrary
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Back to active CVEs
Medium · CVSS 4.8CVE-2026-78363

MW WP Form < 5.1.5 - Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge TagsCVE-2026-78363

Answer in brief

CVE-2026-78363 records a Medium severity (CVSS 4.8) vulnerability in MW WP Form < 5.1.5 - Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge Tags. The current sources do not mark it as known exploited. The current feed maps Unknown/MW WP Form (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 1, 2026Updated Sep 1, 2026Source checked Oct 16, 2026First seen by HOL Sep 1, 2026Material review Sep 1, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 4.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/MW WP Form (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/MW WP Formgeneric>=0 <5.1.55.1.5

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/MW WP Form.
  2. 2Review the reported fix. Update Unknown/MW WP Form to 5.1.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 1, 2026

Sources and claim methodology

  • Source referencewpscan.com
Upstream source description

The MW WP Form WordPress plugin before 5.1.5 does not prevent shortcodes in user-submitted values from being executed when it merges those values into a message that it later processes for shortcodes, allowing unauthenticated users to run any shortcode registered on the site. Exploitation requires the site to have been configured to echo a submitted value back to the visitor after submission.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FiboSearch <= 1.34.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'purchased_plan' ParameterSame generic ecosystem
  • Social Share Buttons <= 1.30 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'share_url' Network SettingSame generic ecosystem
  • Server-Side Request Forgery in Wegow PDF exportSame generic ecosystem
  • Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content <= 4.17.5 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Comment Content Rendered on ProfilePress User Profile 'Comments' TabSame generic ecosystem
  • Cifs-utils: mount.cifs credential-file option injection allows local privilege boundary bypassSame generic ecosystem
  • Name Directory <= 1.34.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'dir' Shortcode AttributeSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-74
Source
CVE List V5
Source checked
Oct 16, 2026
References
1 linked source
Open source record